Just as computer play a central part in developing and applying scientific knowledge, they can also facilitate learning of science. It is, therefore, the position of the National Science Teachers Association that computer should have a major (1) ................ in the teaching and learning of science. Computers have become an essential classroom tool for the acquisition, analysis, presentation, and communication of data in ways which (2) ................... students to become more active participants in search and learning. In the classroom, the computer offers the teacher (3) .................. flexibility in presentation, better management of instructional techniques and easier record keeping. It offers students a very important (4) ................ for learning the concepts and processes of science through simulations, graphics, sound, data manipulation, and model building. In the field, the (5) ....................of the laptop computer enables students to actively gather and analyze data and take it back to the classroom for in-depth study and the sharing of information. These capabilities can (6) .................. scientific learning and facilitate communication of ideas and concepts. In case the emphasis (7) ................... computer is misunderstood, we assert immediately that computers should enhance, but not replace essential “ hands on” laboratory activities. 1.A. role B. factor C. effect D. duty 2.A. let B. allow C. have D. suggest 3.A. fewer B. less C. most D. more 4.A. resource B. result C. product D. technology 5.A. portably B. portable C. portability D. importable 6.A. protect B. improve C. preserve D. impact 7.A. in B. for C. on D. above